MAX3221 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver | TI.com

MAX3221
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver

 

Recommended alternative parts

  • TRS3221E  -  The device has the SAME FUNCTIONALITY/PINOUT as the compared device but includes enhanced IEC61000-4-2 ESD Protection. TI recomends the TRS3221E.
  • TRS3221  - The device is an EXACT EQUIVALENT in functionality and parametrics to the compared device. 

Description

The MAX3221 device consists of one line driver, one line receiver with dedicated enable pin, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. These devices operate at data signaling rates up to 250 kbps and a maximum of 30-V/±s driver output slew rate.

Flexible control options for power management are available when the serial port is inactive. The automatic power-down feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal on the receiver input, the driver output is disabled and the supply current is reduced to 1 µA. The INVALID output notifies the user if an RS-232 signal is present at the receiver input.

Features

  • RS-232 Bus-Pin ESD Protection Exceeds
    ±15 kV Using Human Body Model (HBM)
  • Meets or Exceeds the Requirements of
    TIA/EIA-232-F and ITU V.28 Standards
  • Operates With 3-V to 5.5-V VCC Supply
  • Operates up to 250 kbps
  • One Driver and One Receiver
  • Low Standby Current: 1 µA Typical
  • External Capacitors: 4 × 0.1 µF
  • Accepts 5-V Logic Input With 3.3-V Supply
  • Alternative High-Speed Pin-Compatible
    Device (1 Mbps)
    • SNx5C3221
  • Automatic Power-Down Feature Automatically
    Disables Drivers for Power Savings

Parametrics

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Part number Order Drivers per package Receivers per package Logic voltage (Min) (V) Data rate (Max) (kbps) Main supply voltage (Nom) (V) Features ESD HBM (kV) Rating Operating temperature range (C) Package Group
MAX3221 Order now 1     1     3.3     250     3.3
5    
Auto-Powerdown     15     Catalog     -40 to 85
0 to 70    
SSOP | 16
TSSOP | 16    
MAX3222 Order now 2     2     3.3     250     3.3
5    
Powerdown     15     Catalog     -40 to 85
0 to 70    
SOIC | 20
SSOP | 20
TSSOP | 20